Mixer



M. L. GEHL, A. L. MERRIAM AND H. M. GEHL. MIXER.

APPLxcATloN man JULY 21.1919.

Micheal L EEhL @Zt 41mm/ Amm LMErriam GMOMW Patented May 25, 1920.

Y all citizens of the United States,

UNITED STATES PATENT oFFicE.

MICHAEL L. GEEL, ARTHUR L. MERBIAM, AND HENRY M. GEHL, F WEST BEND,

' WISGQNSlN.

MIXER.

Application led July 21, 1919.

To all 'whom t may concern:

Be it known that we,vMicHAnn L. Gis1-iii, ARTHUR L. MERRIAM and HENRY M. GEHL,

andresidents of West Bend, in the county of Washington and State of Visconsin, have invented certain new and useful Improvements in y Mixers; and we do hereby declare that the following is a full, clear, and exact description thereof.

This invention refers to new and useful improvements to mixers o f the centrifugal type, and more particularly to concrete mixers.

An efficient type of mixer of lthis character is one which may axis from loading and mixing position to dumping position, and which is rotatable in one direction when in the first mentioned position and rotatable in a reverse direction in the second position. In this way all the material mixed is effectively expelled from the mixing receptacle when the latter is' in dumping position. vised to perform these functions, nearly all of them have been more or less complicated. lt is therefore he principal object of this invention to provide a very simply con-y may be inexpensively vention resides in the novel fea-tures of conn struction, combination and arrangement of parts which will be hereinafter particularly described and claimed and shown in the drawing in which, i

Figure 1 represents a side elevational view partly in section of the upper portion of a concrete mixer.

Fig. 2 is a plan view of the parts shown in Fig. 2, and

Fig. 3 is a detail sectional view taken substantially on the plane of the line 3-3 of Fig. 1.

This mixer consists essentially of a supporting frame, a mixing receptacle tiltably and rotatably mountedV thereon, tilting means. and means for rotating the receptacle. The supporting frame only a small portion of which is depicted in the drawing, consists largely of angle metal bars, cer- Specoaton of. Letters Patent.

be tilted above an VVbearings being open Vily seated therein between the upstanding All the mixers which have been de-y Y meshed with the teeth of raten-tea May 25, i920.

Serial No. 312,372.

tain of which are arranged in inverted V- shape to form legs 1. The upper or apex ends of each pair of legs 1 are joined by a casting 2, thesaine having a leg attaching portion 3 and a bearing portion 4.

The mixing receptacleor drum 5 is of ordinary or conventional design, it having a stub supporting axle 6 projecting from its bottom in its longitudinal axis of rotation, the same being journaled in a bearing hub 6 forming part of the yoke 7. Each of the arms of the yoke has a laterally extending trunnicn 8, said trunnions being journaled in open yoke-like bearings 9 formed in the bearing portion of the castings 2. Said the trunnions are readarms which are connected by retaining. pins or bolts 10 as shown in Figs. 1 and 2.

Disposed around the mixing drum adjacent the bottom thereof is a Vworm wheel 11, the teeth of which are adapted ,f to mesh with the teeth of a worm 12 fixed midway the ends of a drive shaft 13 which is journaled in bearingscarried by corresponding legs 1. One end of this drive shaft is provided with power pulley 14 which maybe driven in any desired manner.

The mixing drum both when in loading position and when in emptying position is disposed at an angle to the horizontal or vertical, vthe mouth thereof when in the first position being upwardly, while in the `second position it is disposed downwardly to pro- From Fig. 1 it will be receptacle is shown in oneposition in full ,lines and in the other position in dot and dash lines,

and that when in both positions the teeth of the worm wheel 11 will be the worm 12, although while'being moved to and from these positions said teeth will be disengaged. As a result of this the drum will readily be rotated in either of its two positions; the direction of rotation is, however, reversed in the two instances.

The teeth of the worm wheel 11 and the worm 12 are held in proper relation when in either loading or dumping position by the engagement of a stop lug 15,. carried by one of the trunnions 8, with either of two stop shoulders 16 and 17, both of which are formed on one of the castings 2. A handle 18 to which the stop lug 15 is attached, is

extended from said trunnion 8. "his handle is used for tilting the mixing drum to' shift the same from one position to the other, the stop lug l5 being engaged With the When the drum is in load-l stop shoulder 16 ing and mixingpositions, Whereas the stop flug. engages lthe other shoulder 17V when maintenance ofthe mixing drum in dumpinv position is desired. V

f Irom the foregoing description it Will be appreciated that We have devised an arrangement whereby a mixing receptacle, capable off being tilted from loading to dumping position, may be rotated in opposite directions ivhen'in its two positions, the

rotation of the receptacle being discontinued, however, during movement of the .same from Vone position to the other, this allbeing accomplished merely by the provision Vof a single Worm and a worm wheel having spiral e teeth. The usual multiplicity of gears and gear rings together With other usual parts is thus eliminated. Various minor changes i may be made in the form and proportion and in theseveral details of construction Without departing from or sacricing any of the features of before set forth.

e claim: i i

. In a mixer, a supporting frame, a rotary mixing receptacle tiltable on said frame from loading to dumping positioma driven Vgear connected With-thereceptacle for res' r'volving the same, adi-ive shaft journaled inthe frame y substantially parallel to the tilting axis ofthe receptacle, a single driving gear on said shaft for intermittent engagement by. the driven gear, and means for .tilting the Vreceptacle to swing thesame to and from s'aidloading and dumping po- 1 v-sitions, said `gears beingengaged when the receptacle .isin'loading in dumpingA position, and-disengaged when therla'ttervis being moved to and fromeither of*` said positions.` 1 2. In

position, Aa "Worm Wheel surrounding said 'shaft journaledzin said` frameand extendprising a the inventionr as herein y prising a pair of spaced end members, eachV y trunnions, astop lug on the handle,- a pair oi y. selectively engaged .by the stop lug, shoulders being i. a ymixen-a supportingframe, a ro` Y' Vtary mixing receptacletiltablevon saidframe *Y .e from loading to dumping Y i receptacle, Va drive of the receptacle ,a single Worm on said drive shaft adapted to be intermittently engaged by said Worm Wheel, and means for tilting the receptacle to swing the same to and from said loading and dumpingpositions, one portion of the Worm Wheel being engagedyvith the Worm Whenthe receptacle-V is in loading position to revolve the same in'one direction, theY Worm 'being engaged by another portion of the Wormv Wheel When the p receptacle is in dumping position to rotate the same in the reverse direction, said Worm and Worm Wheel being out of engagement when the receptacle is being moved to or from its loadingl and dumping positions.

3, In a mixer, a supporting framev compair of spaced end members, each having a bearing plate providedwith a bearing, a rotatable mixing receptacle having opposite extending trunnions seatedk in said bearings, a tilting handle Vfixed to oneol, the trunnions, a stop lug on the handle, a pair of stop shoulders on oneV bearing plate to be selectively engaged by the stop lug, and meansfor revolving the receptacle When either stop shoulder is engaged by said stop lug. n y

4. In a mixer, asupporting frame comhavinga bearing plate provided With a bear ing, a rotatable mixing receptacle having opposite extending trunnions seated in'said bearings, a tilting handle lixed to one of the st'oplshoulders onr one bearingplate to be said stop substantially 180apart, a driven gear connectedivith the receptacle, vand yadriving gear Vto be engaged by the` drivenl gear torotate the receptacle-in one direction When said stop f lug engages `one stop vshoulderiand inthe opposite direction vwhen the other Vstop shoulder is so engaged.

1 In testimony thatwwe claim the foregoing y95 Vlive.h'ave'hereunto .setflour hands lat West Bend,jin the county-of II/Vashington andk State ofrVVisconsin. jf .A

Y. ".fMERIiiAM. 

